"Send files to calc" won't accept certain valid filenames.

[Zaalan3]

What's wrong, and with what software version?

Operating System: Windows 10
CEmu version: CEmu v2.0dev (git: d606eb3)
Describe your issue:

When sending an appvar to CEmu with the variable name 'out/BANK', the variable in question won't actually be sent it being a valid filename. The same file with the variable name 'BANK' will send.

What are the steps to reproduce this issue?

1. Create an appvar with convbin with the variable name 'out/BANK'
2. Create an appvar from the same source file with the variable name 'BANK'
3. Send both to CEmu and a physical calculator via TI-Connect
4. Both will show on the calculator, but only 'BANK' will show on CEmu

Any logs, error output, screenshot, other comments...?

An example of a / being used fine on-calc.